干旱区生态环境知识资源中心(Arid): 地下水和干旱指数对植被指数空间分布的联合影响:以鄂尔多斯高原为例

Arid

	地下水和干旱指数对植被指数空间分布的联合影响:以鄂尔多斯高原为例
其他题名	Joint influences of groundwater and aridity index on the spatial distribution of vegetation index: a case study in the Ordos Plateau, China
	齐蕊 1; 王旭升 1; 万力 1; 黄金廷 2; 冯雨晴 1; 蒋小伟 1; 韩鹏飞 1
来源期刊	地学前缘
ISSN	1005-2321
出版年	2017
卷号	24 期号:2 页码:265-273
中文摘要	鄂尔多斯高原无定河与都思兔河之间的地段属于我国西北地区典型的干旱-半干旱过渡带,覆盖毛乌素沙地,存在大量的地下水浅埋区,为植被生长创造了有利条件。前人研究表明鄂尔多斯高原沙地植被的盖度随着地下水埋深的减小而增大,但没有充分考虑气候梯度的影响。本研究依托大量井孔调查资料建立了研究区地下水埋深的高分辨率栅格数据,与区内增强型植被指数EVI的遥感数据和气候数据进行相关分析,并建立地下水埋深与干旱指数双因素坐标系来确定区域植被指数对地下水和气候背景的联合响应。研究结果表明:干旱指数和地下水埋深的增大都会导致植被指数的概率统计值减小。干旱指数介于3~5时,地下水埋深对植被指数的影响比较显著,且地下水埋深介于1~3 m最有利于高盖度植被的出现。地下水显著影响植被分布的临界埋深约为7 m。这一结果改进了前人关于鄂尔多斯生态水文地质特征的认识。
英文摘要	The region between Wuding River and Dosit River in the Ordos Plateau, China, is a typical arid to semi-arid zone in Northwest China. This region is covered by the Mu Us desert, whereas shallow groundwater exists in many places, which created a favorable condition for vegetation growing. Previous studies showed that the vegetation coverage in the Ordos Plateau increased with the decrease of groundwater depth, but the impact of the climatic gradient was not soundly considered. This study establishes a high resolution grid data of groundwater depth in the study area based on a large amount of well data, with which to conduct an analysis on the correlation between the satellite enhanced vegetation index (EVI) and groundwater/climate data. A double factor coordinate system composed of groundwater depth and aridity index is developed to show the response of vegetation index at regional scale on both of the groundwater condition and climate background. Results show that both the increases of aridity index and groundwater depth will lead to the decrease of the statistical values of vegetation index of specific probabilities. When the aridity index ranges between 3-5, the vegetation index is significantly influenced by groundwater depth, and the most beneficial groundwater depth to the emergence of high coverage vegetation is 1-3 m. The critical groundwater depth for significant groundwater-vegetation relationship is about 7 m. The results improve the understanding of the eco-hydrogeological characteristics in the Ordos Plateau.
中文关键词	地下水埋深 ; 植被盖度 ; 气候梯度 ; 干旱区 ; 鄂尔多斯
英文关键词	groundwater depth vegetation coverage climatic gradient arid region Ordos
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5947064
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235811
作者单位	1.中国地质大学(北京)水资源与环境学院, 北京 100083, 中国; 2.中国地质调查局西安地质调查中心, 西安, 陕西 710054, 中国
推荐引用方式 GB/T 7714	齐蕊,王旭升,万力,等. 地下水和干旱指数对植被指数空间分布的联合影响:以鄂尔多斯高原为例[J],2017,24(2):265-273.
APA	齐蕊.,王旭升.,万力.,黄金廷.,冯雨晴.,...&韩鹏飞.(2017).地下水和干旱指数对植被指数空间分布的联合影响:以鄂尔多斯高原为例.地学前缘,24(2),265-273.
MLA	齐蕊,et al."地下水和干旱指数对植被指数空间分布的联合影响:以鄂尔多斯高原为例".地学前缘 24.2(2017):265-273.